Improved machine pok separating stones feom clay



@einen gisten @anni @ffice Zettrs Patent No. 81,314, dated .August 1S, 1863.

IMPROVED MACHINE FOR SEPARATING STONES FROM GLAY.

@the Stimme :stemt tu in ikea Miers atentv mit rating part rf the same.

To ALL WHoM 1T MAY coNcEnN:

Be it known that I, DARIUS WELLINGTON, of Boston, in the county of Suffolk, and State of Massachusetts,

have invented an Improved Machine forSeparating Stones from Clay; and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of "this specification, is a description of my invention snicient to enable thoseskilled in'the art to practise it.

Inl preparing `clayto be moulded and burnt, to form bricks, it is v ery desirable, while working or grinding the clay to make it homogeneousto separate from the plastic substance the stones or pebbles which are oftenfound 'in considerable numbers in beds of, clay, such separation' being at all times a matter of importance, as a'ecting-the quality of the brick produced, and being. especially important inthose castes where the clay is to be moulded into form by machinery, as the presence of stones in the clay is the cause of a largefpart'of the breakage which occurs in bricklmoulding machines. I Y

Of the drawings, which represent a machine which embo'dies my invention- Figuiie 1 is a longitudinal section, and

Figure 2 is a section of a part of the maehine,taken on the line z w, seen in iig. 1, and showingiin the plan the grate through which the wrought clay escapes.

I n a close, stout box, a, having an open -hopper-mouth, into which rough clay can be thrown; is a shaft, b,

l provided with arms, c, which act to reduce the clay from a lumpy condition, said armslhaving their blades set angular-ly, so as to nrove the clay onward from the pointofventry toward the point of delivery.-

Onthe end of said shaft 6 there is fixed a screw, f, which operates on the reduced clay to feed'it forward,V

or to press it into a chamber which is located beyond, and which has at the bottom a grate, d, the openings in which are of such size as to permit the wrought clay to pass through, but which will not permit the passage of stones of such size as may be injurious to the bricks or the brick-making machinery, l Y

The top of this chamber, overr` the grate d, is marked e, and is inclined in such a manner that the clay isl deflected by it upon the grate, so that the action of the screw-blade f operates to force the clay downward as well as onward, the stones which' are in Lthe clay being forced forward in the body of the clay and on the sur? face ofthe grate to a kind of pocket, z,"beyon`d the inclined top' a, in which pocket the top is parallel with the surface' of the grate, so that in said pocket there is no specizil downward pressure, a

The part of this pocket'where the stones collect is provided with movable bars, placed at distances apart about equal to the vspaces between the grates, so that any clay which is carried forward with the stones may escape past the `bars which are marked g. A

These bars are made movable, so that when a considerable quantity of stones has collected in the pocket, one or more'of the bars g may be removed, and the stones can betak'en out ofthe pocket'. i

I claim, in delay-mill, the arrangement of theparts, substantially as herein described; that is to say, arranging the delivery-grate d beyond the shaft and these in relation to the iclinee, so that the blades on said shaft shall cause a movement ofV the mass of clay over the grate and under the'inclinc e, by which movement the clay is forced through the grate, and the stones moved forward thereon, and into the pocket L, which pocket is provided with movable bars g, or their. equivalents. p

DARIUS WELLINGTON.

Witnesses:

J. B. Cnosnr, FnANcrs GoULD. 

